Experimental verification of multi-copy activation of genuine multipartite entanglement

• URL: http://arxiv.org/abs/2510.12457v4
• Date: Thu, 06 Nov 2025 15:37:41 GMT
• Title: Experimental verification of multi-copy activation of genuine multipartite entanglement
• Authors: Robert Stárek, Tim Gollerthan, Olga Leskovjanová, Michael Meth, Peter Tirler, Nicolai Friis, Martin Ringbauer, Ladislav Mišta Jr,
• Abstract summary: genuine multipartite entanglement (GME) is a type of correlation beyond biseparability.<n>It is relevant for characterizing and benchmarking complex quantum systems.<n>It can be activated from multiple copies of biseparable quantum states.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: A central concept in quantum information processing is genuine multipartite entanglement (GME), a type of correlation beyond biseparability, that is, correlations that cannot be explained by statistical mixtures of partially separable states. GME is relevant for characterizing and benchmarking complex quantum systems, and it is an important resource for applications such as quantum communication. Remarkably, it has been found that GME can be activated from multiple copies of biseparable quantum states, which do not possess GME individually. Here, we experimentally demonstrate unambiguous evidence of such GME activation from two copies of a biseparable three-qubit state in a trapped-ion quantum processor. These results not only challenge notions of quantum resources but also highlight the potential of using multiple copies of quantum states to achieve tasks beyond the capabilities of the individual copies.

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